M5 × 0.5 fine Thread Dimensions
M5 x 0.5 (fine) is a fine ISO Metric thread. Pitch is 0.5 mm, equivalent to 50.8 threads per inch. The recommended tap drill leaves roughly 75% thread engagement.
Thread profile
millimetres unless statedBasic information
- Designation
- M5 x 0.5 (fine)
- Thread system
- ISO Metric
- Series
- fine
- Standard
- ISO 262
- Basic profile
- ISO 68-1 basic profile
- Flank angle
- 60°
Dimensions
- Major diameter
- 5 mm
- Pitch
- 0.5 mm
- Threads per inch
- 50.8
- Pitch diameter
- 4.68 mm
- Minor diameter (external)
- 4.39 mm
- Minor diameter (internal)
- 4.46 mm
- Thread depth
- 0.307 mm
- Recommended tap drill
- Ø 4.5 mm
How these values are derived
computed from the basic profileThese figures follow the ISO 68-1 basic profile of ISO 262. A 60° basic profile uses a fundamental triangle height H = 0.866025 × P, with external minor diameter d₃ = d − 1.226869 × P and internal minor diameter D₁ = d − 1.082532 × P; the two differ because the external root is rounded while the internal crest is truncated. A 55° Whitworth profile uses H = 0.960491 × P and a thread height of 0.640327 × P. The recommended tap drill is given as nominal diameter minus pitch, which approximates 75% thread engagement — adjust it for tough materials or deep holes.
Compatible parts216 specification pages
All M5 fastenersEvery fastener below is threaded M5 × 0.5 fine, so a nut, bolt or washer picked from this list will mate with it.
Showing the first 40 of 216 specification pages.
Related
Other pitches at the same 5 mm diameter — a fine pitch on a coarse diameter, or the reverse, is the usual substitution question.
Neighbouring sizes in ISO Metric.